Fix all Sphinx reference warnings in the documentation (meta issue)

This supersedes the previous closed issue for this: https://github.com/python/cpython/issues/101100

I have created several sub-issues (see table below) to split the work up and avoid what happened the last time. This is the meta issue for this task, any general discussion on this topic should go here, not on the sub-issues, and vice-versa.

In each of the issues, I've added the current list of warnings. Note that the warnings themselves, and their line numbers may change.

There are some warnings that come up with no file:

<unknown>:922: c:type reference target not found: PyWeakReference [ref.type]
<unknown>:956: c:data reference target not found: Py_FileSystemDefaultEncodeErrors [ref.data]
<unknown>:957: c:data reference target not found: Py_FileSystemDefaultEncoding [ref.data]
<unknown>:970: c:data reference target not found: Py_HasFileSystemDefaultEncoding [ref.data]
<unknown>:1026: c:data reference target not found: Py_UTF8Mode [ref.data]
<unknown>:1037: c:type reference target not found: Py_intptr_t [ref.type]
<unknown>:1141: c:type reference target not found: Py_uintptr_t [ref.type]
<unknown>:1168: c:type reference target not found: ssizessizeargfunc [ref.type]
<unknown>:1169: c:type reference target not found: ssizessizeobjargproc [ref.type]
<unknown>:1170: c:type reference target not found: symtable [ref.type]

Linked PRs

• gh-153086

Öffne zunächst die in der Meta-Issue referenzierten Unter-Issues und überprüfe deren aktuelle Warnungslisten; die Warnungen und Zeilennummern können sich ändern. Arbeite die aufgeführten Referenzwarnungen einschließlich der Ziele ohne Datei durch, und betrachte die Arbeit als abgeschlossen, wenn der Sphinx-Dokumentations-Build keine verbleibenden Referenzwarnungen meldet.